painter.cc

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2005 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

//------------------------------------------------------------------------------

#include "Painter.h"

//------------------------------------------------------------------------------
//------------------------------------------------------------------------------

volatile uint32_t* Painter::drawArc(volatile uint32_t* dest, 
                                    size_t width, size_t pitch, size_t height,
                                    ssize_t x0, ssize_t y0, size_t r1, size_t r2,
                                    uint32_t arcColor, 
                                    uint32_t innerColor, 
                                    uint32_t outerColor)
{
    r1 *= r1;
    r2 *= r2;

    for(size_t y = 0; y<height; ++y) {
        size_t offset = y * pitch;
        for(size_t x = 0; x<width; ++x, ++offset) {
            size_t r = (x-x0)*(x-x0) + (y-y0)*(y-y0);
            
            uint32_t color = 
                (r<r1) ? innerColor : 
                ((r>=r2) ? outerColor : arcColor);
            
            if (color!=transparentColor) {
                dest[offset] = color;
            }
        }
    }

    return dest;
}

//------------------------------------------------------------------------------